Pneumatic paper control for printing presses



C. C. SCHUTTE. P'PJEUMATIC PAPER CONTROL FOR PRINTING PRESSES.

APPLICATION FILED FEB. 28. 192i. 1,42 9,301. Patented S p 19, 1922.

. 2 SHEETS-SHEET l.

c. c. SCHUTTE. PNEUMATIC PAPER CONTROL FOR PRINTING PRESSES.

APPLICATION FILED FEB. 23,192]. 1,429,301.

Patented Sept. 19,1922;

2 SHEETS-SHEET 2.

Uaries 6*. 50% zazfe,

, ATTOR VEX Patented Sept. 19, 192 24.

CHARLES c. scncm'rn, or INDIANAPOLIS, INDIANA- PNEUMATIC PAPER- CONTROL non rnin'rme rnnssns. J h

Application filed February 28, 19 21. seriai No. 44s,41 9.'

per Control for Printing Presses, of which the following is a specification.

This invention relates to certain improvements for controlling the movement and for preventing the rolling up or other disarrangement of printed sheets of paper as they are discharged from the impression roller to the receiving table in that type of printing presses embodying reciprocating bed plates.

It is well known among workmen operating the above type of presses that after the latter have been operated at a high speed for a time the machines and also the paper passing therethrough becomeso charged with static electricity that the printed sheets of paper are handled with much difficulty, the

paper seemingly having an atfinity to stick to the carrying tapes, fly sticks and such parts of the printing press with which it' "may come into contact, so that the I'narring of the printed wet sheets presents a difficult problem. The effect of the'static electricity is partially overcome at the present time by providing the printing press with a device for subjectlng the surface of the printed paper, d1scharged from the nnpressmn roller,

" to the influence of heat, usually a gas flame.

The same results may also be attained by reduc ng the speed of the press. or completely stopping the press at intervals. In the latter cases however. a eonsiderable reduction or a complete suspension of the output of the press results. The devices heretotore In use have apparently reduced the amount of static electricity in the paper withoutinaterially affecting any reduction in the press structure itself, so thatp-when the rapidly rocking fly sticks deposit aprinted sheet on the rece-n'lng'tahle of the press the tangs of the fly sticks are sufficiently energized and.

contain suflicient attraction to cause the corners of the deposited sheet of printed paper to be elevated and in many cases roll over vupon the surface of the sheet when the fly sticks recede, so that the iiext printed sheet will be deposited upon the rolled over corners and in effect cause creases in the printed sheet below. These creased sheets of printed paper are classed .as defectives and constitute a considerable waste {when turning out a high class jobofprinting on expensive p p I I The object of the present invention is not only to overcome the above mentioned difliculties, but a further difiiculty-that of preventing the green printed surfaces of the sheets from beingdeposited flatly-' or slapped against thepreviously deposited printed sheet below, and thus prevent blurther characteristic features and objects of the generic invention will be made apparent, to those skilled in the art, by the examinat1 on of the illustrative example of'my improvedtype of organization which is depicted in the accompanying drawings and hereinafter more fully described. It will be understoodhowever that the form of ,construction herein disclosedisfto be considered only asone typical form of my organization, and is not to be regarded'a's limiting flthe mechanical scope of that organization. 1n the drawings, which, const itute an essential part of the'present specification, Figure 1 is a vfragmentary detail view in side elevation of a conyentional'style of printing press embodying a, reciprocating bed-plate, showing therelatiye location of my invention thereto. ,Figl 2 is a fragmentary detail new in side elevation of the opposite side of the press from that shown in Fig. '1, showing the 10021110110f'mYlIIVeIttIOII on thatside table, with one of the. jogger-boards-carrying a .part of my invention shown in elevation,

on the line in Fig. 3 and in which the fly sticks ,are omitted Fig 5 is 'a' fragmentary detail sectional view, on the 'line 55.in Fig. 4:. Fig. (3. is a fragmentary detail sectional view on the line:6 6 in Fig. 3.,,Fig. 7 is a centralvertical sectional view through oneof the air reg l-ating-valve's.

Referring to the drawiflgs, 10' represents the main side frame members of'theppress; 11 therevoluble impression roller, and 12 the receiving table upon which :'the printed sheetsof paper are deposited with the printed surface down. 13' are the usual belts or tapes, as they are known'in'the' artyuponv carried away from the impression roller 11 'which the printed sheets are discharged and 11pthe usual fly sticks which mama ii an are (i-essvibed o ihe. cm'x'wi mm in. Fig. .3 through the medium of 11 c-c-nr mun rck-shaft 15 which is supparied iii thy. saifia members of the frame. Thesis fly sti.c,-.. "zzuig 14, when disposed minim! the impression roller 11 .ii, between. 2111i siigihiiy beiew the upper surface of the tapes 13 say as m Lin-obstruct the free IIEOVQYDBHC of the ancnmigiig sheets of paper 16 cm'iveyed from fiie. impression roller v 3.1. When a shack 01 paper 161's squarely over tim icks 1%- the i'oci gsha ft is rmzized t-iirongii zhe medium of a cam 1'2, lever 18, rack $3 1 15. and the mutilated piiiien 20 t0 causfi the fly sticks- 14% to move flf'fij'l'l the mamas. pus

ition to the full Rim position shown in Fig". 2, at "which iast mentmmd position the 3y sticks diachm'ge and sla the Wet primei :5 0f the sheet of paper broadfiast upon i238 stack 01? imprinted sheets beiiam methad of discharging the Wet Sidfi of a freshly printed surface of slowly drying ai'ieet 0f high grmie hard finished pa-par against; ihe stack 01 sheets 1% beimx remit-s in cunsieiembie loss through ths bimr ring of my printed surfaces if him sheets unless an operator e peciziliy ampicyeii at the m'maiving' tabie for the pin-p050 (if inter" laying: ea'iii px'itzi b zfi szhwt wii'h a. sheet wifpo'mus absorbent paper. This method howv eve:- so increases the cztas; of production tu restrict its use v subjecting the printed 0f (1W c-hargeni fmmthe impression. mile 11 to a gas flame, which is 01d in the art, and to which attention hfiS bar-etefore been. directed, is accompiished by means (if a pipe wvhich extends'tmnsverseiy 0f the press and siighti g' in advance of the paint where the printed sheet leaves the iaeriphery of the impyessirm ZQHQI' 11 and-disciiarge supon iziie gizide fingers 523, best shown in F 1g. Pipe 22, which aci's as a cenductop for the gas from a suitabie smirce of supply, is provided, in its iowar surface with a; series of fine perforations 24; thmugh which the: gas discharges against ihe adjacent surface of the movingpaper. r

\ Arranged immediately above and extend ing paraliei with pipe 22 is a pipe 25"whish gonducts the air transversely of the press, and the latter pipa communicates with a conductor pipe 26 which extends to and. com

municafiiis with casing of a blast fan, wh er' by s, constamfi flow 01'? air is cieiivered. tupiys Pipe :25 ispmvided in its lower edge with a (if pariforations through which theuir is dischairged. upon the acijacent sufiace ofpipe so that the later pipe, acts a cisiieczir fear :iiaseminating @1238??? distribution of ihe air iaining its ejieetive. 0 Qrative' waiting the tuning m.- mlling up of Jim-2 of the swiftly mwmg: printed shcefi s papr Mm g the 13.

As hexflu'fore mentifined. tilt?- tagzes 1B receiva in siwressh e order each pi'iz i of paper {nun the L 51011 roiier and :21 ve iii direutiy over the fly sticks 1 inc fly sticks than removii'zg ihe sheet of papa! from the mums mini, mnveyinqand depasm ing it; with the printed side (inwn upon the stack 16 of file printed 5513M resting upon the tabie 0f the pi'ess. The fly sfiicks l4- untiel" a rapid i m-igii mcwen'zenfi which is syrmh dnisaeii with His movement of in'zpz'es sion roiler i}. to perniii the fly sticks to depos'it a. printed shew? upon table 12 and thence return 1'10 iheii initial positian in U 01.119? in race re "the next printed sheet discharged from 'imywession rolier ll. 'This rapid iucwement of the fiy tiuks 14 results in shipping the broad freshiy printed surface. 0f the sheet of paper harshly and with $1.1 ,ient farce against the adjaeent surface of: the, stash (if pi'inted sheets 16 on table 12 to (351-11526 considerable binning 0 sn'iearing of U1 3. link which results in a cqrwsponcling ammmt af yvaste. To overcome this QbjQC" tion isonemt" the chief objects of the present inventisn, and is accomplisi'ied by means of certain construction and arrangement of parts which will now be'descrilmd.

Table 12 is provided with the usual joggenboai'ds 30 by which the edges of the in regularly deposited. printed sheets of paper are maintaind in a symmetricaiiy dispsseoi stack 16, and as the area oi. the sheets of paper for difierent jobs varies the joggerboar is 30 mustfrom time to time be adjusted relativiy' to. each stile; to suit the canditionsu Hence, in ortiei' that the'presnf invention may be' advzmtageousiyemployed for effecting my'improved landing of the printed'sheets of paper upon tabl 12 as the same am discharged by the? empio am (if the jogger-boards 30 for the muunting sf my ifnven'tion and for maim position thmugimut the varying aegrees of adjustnae-ms of said jnggenboards. The ccnstrucdisazhargimg air at de'efierminei poin's and at pz'zild atm'ininad times fur Mia "-rp'oses, first, mi? csm'i-mliizig iim maveiifaem of the printed. (if paper baiwmm the time thay leave my stisiz" and Emmi upon ta-hie 112 and second, for maintaining the sheets in a flat position upon table 12, by preventing the corners and edges ofthe sheets from curling up. The first of these objects is attained by means of the conductor pipe 35 which is preferably arranged to extend parallel along the rear surface and isattached to the back side of one. ofthe jogger-boards 30 by means of the air discharge nozzle'cups 37 through Which the discharge of the air is effected. I usually employ two of the cups 37 one of which is located near each end of the'joggerboard 30, but more cups can be employed if desired. Each cup 37"communicates with an aperture 38 which extends transversely through jogger-board 30 so that the air from pipe 35 is discharged in a horizontal stream across table 12 for promoting the conditions desired as the printed sheets are ,de osited upon table 12.

'and this pipe communicates with'a main feed pipe 41 which extends to and communicates with an air compressor consisting of a cylinder 42 and a piston 43 which operatewithin said cylinder. Piston 43 is connected to and operated by a crank arm 44' which is mounted on the same shaft 45 upon which cam 17 is mounted and through which a rocking movement is imparted to the fly sticks 14, so that shaft 45 provides the medium for so synchronizing the movements of the fly sticks 14 and the piston 43 to cause air to be discharged through'apertures 38 and cross table 12 during the time that the fly sticks are depositing a printed sheet upon the table 12. As a printed sheet of paper leaves the fly sticks 14 its speed of travel is gradually arrested by reason of'the contact of its broad surface with the horizontal current of air discharging-from apertures 38. Instead of-the sheet of printed paper being thrown or slapped harshly upon.

the stack 16 it settles downwardly'unevenly, the-time required for reaching a position of rest depending upon the rapidity with which the air is displaced from beneath the sheet, as induced by the weight of the sheet.

The time for. the sheet of paper to reach a position of rest being considerably extended over that heretofore consumed, it necessarily .trolled to eifect a discharge through apertures 38 when the fly sticks 14 have reached a predetermined position relatively to the.

point where the printed sheets of paper are discharged. Valve 50 is seated by a spring 51 the tension .of which may be increased so that a discharge of air through apertures tor pipe' 36, heretoforereferred to, which. it

extends slightly above-and parallel with and secured to the upper edge of joggerboard 30, as best shown in Figs; 2iand 5. Pipe 36 communicates with a pipe 41f1whiCh-l J in effect is a continuation of the main supply ipe 41 which leads to the compressor 42. fipe 36 is provided with a plurality of air discharge 'apertures 55 in its lower surface so as to cause the air to be discharged downwardly upon the adjacent edges and corners of the printed sheets of paper resting upon table 12. All of the apertures 55 in pipe/ 36 are usually closed by means ofthe screw plugs 56 with the exception of the ones through which it is desired to effect thedischarge of the air, as best shown in Fig. 4. As the printed sheets of paper may vary in size the points of discharge 96 of the air may also be varied along pipe 36 by closing the apertures 55 which are open and opening some of the apertures which are closed. It is not essential that the centrally located apertures .55 remain open when the printed sheets are not-slit through the center, but where the sheets of paper are slit in the middle when leaving the impres sion roller 11, along the dotted line A in Fig. 3, it is desirable to employ a blast of 5 air for holding the adjacent corners of the divided sheets flat upon table 12. Pipe 41 is also provided with a check valve 60, similar to valve 50, and this valve is adjusted 55 in pipe 36 will be delayed until the moment the fly sticks 14 start to recede, at which time the blast of air prevents the sheet of paper from adhering to the fly sticks '14 and also serves to hold the edges and corners of the sheet-flat against the table 12 orthe sheets of paper previously de osited upon said'table. j V

aving thus fully described my said invention, what I desire to secure by Letters Patent, is-- 1. In a printing press, the combination with an impression cylinder, and a reciprocating type-bed, of a gasconductor pipe extending parallel with the impression cyl inder and transversely of the path of travel of the sheets of printed paper, for sub jecting the latter to a gas flame, an air conductor pipe extending parallel and slightly above the gas pipe and provided with a the gas pipe and provided with a series of downwardly disposed air discharge 0pi3nings for discharging" zzir 222 055 the heat waves gene'ated by the gas flame for effecting an increased range and distribution of the heat across the surface of the printed sheeis of paper, and means fin: delivering an adequate supply of air to said cnndmtor pipe. i

In witness whereofl I have hereunto st my hand and seal at lndizgnapulig Indiana,

this 23rd day of February, .sL D. one thousand nine hundred and lwentymma CHARLES C. SUHUTIETE. [1, 

